High Bay - Low Bay RETROFIT LAMPS - TYPE B BALLAST BYPASS 120-277V2 RETROFIT LAMPS - TYPE B BALLAST BYPASS 120-277V2 RETROFIT LAMPS - TYPE A METAL HALIDE BALLAST COMPATIBLE RETROFIT LAMPS - TYPE A METAL HALIDE BALLAST COMPATIBLE RETROFIT KITS - TYPE C EXTERNAL DRIVER RETROFITS RETROFIT KITS - TYPE C EXTERNAL DRIVER RETROFITS